Combined stoker and fire door



1936. o. MOELLER ET AL con/1311mm STQKER AND FIRE noon Filed July 23, 1952 2 sheets-sheet 1 0 r T Z ATTORNEY.

' 2 Sheets-Sheet O. MOELLER ET AL I COMBINED sTokER AND FIRE noon Filed July '23, 1952 ATTORNEY.

lw m 0 i atented Aug. 25, 1936 were!) STATES v Otto Moeller, Glendale, N. Y., and PauliA. Ketch pel,We'st Englewood, N..z-J. ,.s ass ignors,.to The Standard Stoker "Company, Incorporated, at

"corporation offflelaware Application my '23, 1932,i3sei'i'al15l ;l;24;235

'15 CIaims. (CI

'I'his invention relates to firedoors which are lklli ployed to close the firing openingo-fa furnace and moreparticiflarlyito that type of firedoor -which forrns a-roof or hood portion of astoker 15 -discharge conduitadapted to deliver :fuel into the viurnacethrough the :firing opening,

It -=is the principal object of our invention to provide a firedoor comprising aplurality ofi-teleseopieally: related segments which .are movable .-to' uncover the firing opening to :permit' access --therethrough into the firebox.

;It also an object -.of' this invention-mommwide a firedoorwhich is -movable through an. arc of approximately 90 and which comprises telescopieally related-segments forming .a. roof or hood-pcrtionfor-a Stokerdischarge conduitwhich emmunieates-with-the firing opening.

--A- further object 0f our invention :is the provision of a firedoorcornprising telescopically re- .120 lated segments which i are movable upwardly through anarc of approximately 19.0" .and which formaroof or hood portion afora -stoker. dis- 1 charge conduitin communication withthe 5 -opening, such upward movement of said =telescopically related segments uncovering thefiring opening to permit access therethroughin-tothe firebox.

A still further object of thisfinventionhis the provision of a firedoor as above. describedbut 30 wherein .a downward movement ofthe teleso opi- .cally related segments uncover the firing-opening to. permit accessv therethrough into'the "These and other objects such as the novel con- 35 "struction and relation of partsone with another "will be hereinafter." described infthe following specification and illustrated in the accompanying drawings forming a part thereof.

' on these drawings:

1 is a central vertical longitudinal view of'the rearward portion of a'locomotive showing "the invention in position with portions broken "away;

Fig. '2 is arentral vertical longitudinal view'of the rearward portion of a locomotive showing the "invention in elevation with portions of the operating'-niotor therefor'in section;

Fig. 3-is a view similar to Figures 1 and? showing a modified form'ofthe invention and Fig.4 is a transverse section taken 'on' the line ',4.= '4 of Fig; 3- withparts broken away-and :removed.

-The invention-is shown as being-applied toa ---1locomotive- A having the firebox llL-thefiring "1-55 opening! l in the fireboxbackwall l2 and; adeck flficwhinmextends rearward oft-said ibackwall' and r supmrtsiacab: M.

Extending forwardly vfrom the tender inot showtimeastokerrgenerallyindicated by-B which tainnludes arconduit. lfizand'na curved; nozzle or imischargeoonduit lfi: secured to. theibaokwatll .l candtarrangedqto .adischarge fuel into- .thefirebox .rzthroughrthe firingopening- .The conduit. l5 sand; the nozzle 16:.are iflexibly co neqteiat ,their aadiaeent :ends; asnat J 1 nto; permit artieulatiomlo iitherebetween. A zdistrihutingr plate 1 8 H extends domardlyltfmm the dischar e con uit l6 throu h i-itheiififing opening: it. and, 'nvconiunction'zwith a .;-mess1n:e tfiuidmead. libudistrihutesmtu l to-.a11 ana-rtsioi theifire.

.J'I'ne: dischameicondnit 1.6.. emits-upper; ortion land..directlympposite theefirin open n H is cnenedcnrmape tu d: as et: Z0.-.:,thmushawhic -3apenturewacss tothe. interior of; the fi ebo flmaiy ibe had. .wgovering thisrape ture 207.18. a door gg h Dvmmprisingva lnra ityof s m nts iii- .rransed.dzo; .slide.=one. :w thin th o her wh tthe; preferred dorm- 1' of. oux-invention .are arwrsn ed to! uncover ther i i s op n ,by downrdgswinging movement. =,-';[he s.e;-se gments are ta hin that theirvzlowerx ends-about the stub f shajftsl zjfi and. their respective contacting supe-l-faceszare ;f rmecl-1on-rad i whichare axi wit 1:.theaxns qfithewstub-shaits 21, -,At theirzforward ed e each wit --.-sesm n ;l... 2;. and- 3. ismswide. it-hva dovmwardly projecting lipsuch as 522 550 that: when vthe segment I is swung 1 downewardly fand zrear wa-rdlys-it will .slide over the seg- .zment-22 nt ;l the lip usengages-theeforward edge of the segment 2 causing downward Swinging sgmpyement thereof .tpgetherl-with the segment I =over the segment}.

sittlwillebe-fobserved that the continued downward:-mowement.o f the segment Lwill cause.v the segments I :2, 3-,tos1ide over .thesegment and then these se ments will continue their dow nward-v movement ,until they are brought ,to restsintthe position indicated byethenconventional lines in Figure l at which position an opening t.- uflicient size has. been. uncover wh wi l s permit manual firing or the. inspection of the firebox. In .order to returnlthe. segments to their normal position, each of ethesegments LI, and -.3-iseprovidedatone. of its lower, ends with an "outwardly extending lug such as ,23, the lug jof ethesegment 1| contacting the rear edge of the .ssegmentiland,alsdwthe lugs of the segments! ;and .3 ,each. in turncontactingthe rear edgejof ther'segments 3- and 4,. respectively. Thus, when the segment .LissWun upwardly {the lug of. each gs respective segment will draw along the segment which it contacts, thereby closing the aperture l9.

Preferably, power means is employed for actuating our novel firedoor and in the present instance it comprises a pressure fluid motor M which includes a cylinder housing a piston 25, the movements of which are controlled by a valve 25 operable through the foot pedal 2'! disposed above'the cab deck I3. The piston 25 is connected to one end of a rod 28 While to the opposite end of this rod there is connected a cross-head 29 which is reciprocably mounted in the guideway 35. A link 3| connects the crosshead and segment I of the firedoor.

In the normal operation of the-stoker, the firedoor is in a closed position and thepiston 25 is in the position as shown in Figure 2. Pressure fluid is supplied to the valve chamber '32 by. a lead 33:

and from there passes into the cylinder 24 through the port 35, thus holding the piston in its upward position and thereby preventing the opening of the firedoor should an explosion occur in the firebox. Whenever it is desired to open the firedoor, the fireman depresses the pedal 21 with his foot causing the valve 26 to move upwardly. Pressure fluid from the valvechamber 32 will i then enter the port 35 at the upper end of the cylinder 25 and move the piston 25 downwardly,

' and the pressure fluid in the cylinder 24 below 1 movement of the piston 25 will pull the segment l through the connecting link 3| and thus'cause the telescopically related segments to be. swung downwardly as previously described to the position indicated by the broken lines in Figure 1.

When it is desired to close the firedoor, the

'fireman removes his foot from the pedal-21, and

since the valve 25 is unbalanced-by having a piston 3'? at its lower end of larger diameter than the piston 38 at its upper end, the'valve and its associated foot pedal 2? will return automatically to theposition shown in Figure 2. The pressure fluid in the chamber 32 then enters the cylinder 25 through the-port 34 at thelower end thereof and returns the piston 25 to its original position. During this operation, the pressure fluid in the cylinder above the piston evacuates through the port 35 to atmosphere. The upward movement of the piston 25 causes the segment I to swing upwardly and thus draw the other segments 2, 3, and 5 by means of the lug's- 23 which extend-inward from the segments 2, and 3 and contact the rear edges of the segments 2, 3, and 4 respectively.

best illustrated in Figure 3, the aperture in the discharge conduit H3 is opened by an upward swinging movement of the firedoor, which firedoor comprises the segments 5|, 52, and 53 arranged to slide onewithin the'other, each of which is provided with a pin such as 54 which extends upwardly from the outer surface of the segment. with arcuate grooves 55 and 56 respectively, which receive the upwardly extending pin in each of said segments 5| and 52. Embracing the firing opening 5 is a frame 51 which is formed with the discharge conduit 65 and which is provided with a rearward extension 58. The underside of the roof portion 59 of the extension 58 is grooved as at 55 to receive the pin 55 of the segment 53. The segments 5|, 52, and 53 are mounted on stub shafts such as 5| and are operable by a pressure fluid motor M which is similar to the motor M The segments 52 and 53 are provided of the preferred form of our invention with the exception that the piston thereof moves upwardly when the foot pedal 52 is depressed and moves downwardly when the fireman removes his foot from the pedal 62. The cross-head 63 of the motor M is mounted to reciprocate in the guideway 55 and a link 55 connects the cross-head 63 with an ear 65 which extends outwardly from the segment 5|.

In the operation of the modified form of our invention, the upward movement of the crosshead 63 swings the segment 5| in an upward direction. In its upward travel the forward edge 61 of the segment 5| engages the lip 68 of the segment. 52 causing this segment to swing upwardly and forwardly until the segment 53 is similarly moved beneath the extension 58. The segments 5|, 52, and 53 are then in the position shown. by the broken lines in Figure 3-, thereby permitting access into the firebox through the I aperture 50 and the firing opening When the fireman releases the pedal 62, the cross-head 63 returns to the position shown in Figure 3. During the downward movement of the crossthe pin 54 thereof engages the rear edge 69 of the segment 52 and pulls it downwardly. It is of course, apparent that the continued downward movement of the segment 5| will close the firedoor by returning the segments 5|, 52, and 53 to their original position, the pin 54 of the segment 53 engaging the rear edge 10 of the extension 58 thereby arresting further downward movement of the segments.

While our invention has been illustrated and 'the various forms of doors now in use, such as the well known vertical door which is in use on many locomotives. The various uses of our invention are defined by the appended claims.

We claim:

1. In combination with a firebox having a back- '1 portion of said discharge conduit being open r opposite said firing opening and a door for said 5 In the modified form of the invention which-is Y firing opening forming a hood for the open portion of said discharge conduit, said door comprising a plurality of segments arranged to slide one within the other, and means for moving one of said segments for partially uncovering said firing opening,th e continued movement of said segment causing 'movement of the next succeeding segment for further uncovering said firing opening.

2. In combination with a firebox having a backwall provided with a firing opening therethrough, a stoker discharge conduit attached to said backwall and delivering fuel to said opening, the upper portion of said discharge conduit being openopposite said firing opening and a door for said firing opening forming a hood for the open portion of said discharge conduit, said door comof said segments downwardly for partially unhead, the segment 5| is swung downwardly and -25 ?3';"()51 8i2 "coveringsaid firing opening, the continued downward movement of said 'eegment causing downward mover'nent-of the next succeeding segment for furthe'r'un'covering said-firing opening.

3. In combination with a firebox having a -backwall provided with a firing opening therethrough,-a stoker discharge conduit attached to said backwall and'delivering fuel to-saidop'ning-the upper portion of said discharge conduit beingopen opposite said firing opening and a doorfo'r said firing opening. forming a hood for the open portion of said discharge conduit; said for further uncovering said firing, opening.

4. In combination with'a firebox having a backwall'provided with'a firing opening therethrough,

a stoker discharge conduit attachedto said backwall and delivering fuel to said opening, the upper portion'of said discharge conduitbeing open opposite said firing opening and a door 'for said firing opening'forming a hood for the'open poition"of said discharge conduit, said door comprising a plurality of segments arranged to slide one within the other, each of said segments having means adapted to engage its next succeeding segment for limiting the movement'of said segments relatively to eachother, and means exterior of the conduit for moving one of said segments along the next succeeding segment for partially uncovering the firing opening, continued movement of said first named segment causing the remaining segments by reason of their engaging relation to be successively moved tohirt her uncover said firing opening.

5. In'combination with a firebox having a backwall provided with a firing opening therethrough, a stoker discharge conduit attached to said back- Wall*anddelivering fuel to said opening, the upper portion of said discharge conduit being'open opposite said firing opening, and a door for said firing-opening forming'a hood for the open portion'of said -discharge'conduit, said door comprising a plurality of segments arranged to slide one within the other, said segments being mounted on pivots for swinging movement fore and aft with respect to said firing opening, the adjacent surfaces of said segments being coaxial with the axis of said pivots, each of said segments having means adapted to engage its next succeeding segment for limiting the movement of said segments relatively to each other, and means for moving one of said segments for partially uncovering said firing opening, the continued movement of said segment causing successive movement of each of the remaining segments by reason of their engaging relation to further uncover said opening.

6. In combination with a firebox having a backwall provided with a firing opening therethrough, a stoker discharge conduit attached to said backwall and delivering fuel to said opening, the upper portion of said discharge conduit being open opposite said firing opening, and a door for said firing opening forming a hood for the open portion of said discharge conduit, said door comprising a plurality of segments arranged to slide one within the other, said segments being mounted on pivots for swinging movement fore and aft with respect to the firebox, the adjacent surfaces of said segments being coaxial with the fa xis 6f 5 said pivots, each of "said segzh'entsiiav- 1 ing means adapted to engage its next succe'ain segment for limiting the movemento: Sal gfne'rits relatively-to each other, empower me its for swinging one-or said Segments aldiigth e next "siicceedin'gsegmerit for partially unchvering'eai'd opening, said power means including a meter comprising a reciprocable piston connected to *said firet flamed-segment, a valve for "controlling the "move-mentof 'said-piStoh and means for "613- 5 erati-ng "said valve, said first named segment ing 'mbvable by said 'piston through an a approximately 90, continued movement or said firstna'm'ed segment by said piston causingthe -rinainin'g s'e'ginents by reason of their engaging relation to be successively moved to furtheriiricover said firing opening. T d

'7. In a firedoo'r apparatus, the combinationof a door comprising a plurality "of segmehts' -arranged to -slide one within the other, these- "jacerit surfaces of said segments being parallel, and power means for moving one of saidse'gments along the next succeeding segment ier partially opening said door, said power m'earis incliiding a motor comprising a reciprocable iaiston connected to said first named segment, a. valve for controlling the movement of said piston and means for operating saidvalve,'-said segments being provided respectively with means whereby one 'se'gment will engage ifs succeeding segment for limiting the movement of said segments relatively to each other, continued fiiovement of said first named segment by-"seid 151'ston causing the remaining segments by reason of their engaging relation to be successively" moved to'open the door.- r I 8.'In a firedoor apparatus, the combinationfof a door comprising a plurality of segments *arranged -to slide one within the other, the adjacent surfaces of said segments being ip rii'll'el, and power means for movingofie" of said segments downwardly along the next succeeding segment -impartially opening said door, said powermear is including a motor comprising a reciprocable pi'ston connected to one of said segments, and a valveror controlling the movement of said'pi'ston, saia piston mbvmg said first nanied'segmen't downwardly, said segments being provided respectively with means whereby one segment will engage its succeeding segment for limiting the movement of said segments relatively to each other, continued downward movement of said first named segment by said piston causing the.

remaining segments by reason of their engaging;

relation to be successively moved downward to open the door.

9. In a firedoor apparatus, the combination of a door comprising a plurality of segments arranged to slide one Within the other, the adjacent surfaces of segments being parallel, a frame member for supporting said door, the segments of said door when in a closed position being slightly over-lapped and in engagement with each other to prevent relative downward movement therebetween, the segment which is adjacent .said frame having an adjacent edge in engagement with the rearward portion of said frame member to arrest downward movement of said segment, each segment overlapping the adjacent segment to the rear thereof, and power means for moving one of said segments upwardly along the next succeeding segment for partially opening said door, said power means including a motor comprising a reciprocable piston connected to one of said segments, and a valve for controlling the movement of said piston, said piston moving said connected segment upwardly, said segment as it is moved upwardly under the next succeeding segment by said piston, engaging said succeeding segment whereby the continued upward movement of said connected segment by said piston will cause upward movement of said succeeding ;segment.

10. In combination with a firebox having a wall provided with a firing opening therethrough, a stokerdischarge conduit for delivering fuel to said opening, the discharge end of said conduit embracing said opening, the forward portion of said conduit being formed of a plurality of pivotally mounted segments arranged to slide within one another, and means arranged for successively sliding said segments within one another exposing substantially the entire firing opening.

11. In combination with a firebox having a .wall provided with a firing opening therethrough,

a stoker discharge conduit for delivering fuel .to said opening, the discharge end of said conduit embracing said opening, the forward portion of said conduit being formed of a plurality of piv- .otally mounted segments arranged to slide within one another, and means arranged for successively sliding said segments downwardly within one another exposing substantially the entire firing. opening.

- '12. In combination with a firebox having a wall provided with a firing opening therethrough, a

stoker discharge conduit for delivering fuel to .said opening, the discharge end of said conduit ginal edge of said'openirig to swing fore and aft with respect to said firebox for covering and uncovering the firing opening, said segments being arranged to slide within one another.

14. In combination with a firebox having a wall provided with a firing opening therethrough, a stoker discharge conduit for delivering fuel to said opening, the forward portion of said conduit being formed of a plurality of segments mounted on pivots adjacent the lower marginal edge of said opening to swing fore and aft with respect to said firebox for covering and uncovering the firing opening, said segments being arranged to slide within one another, each of said segments having means adapted to engage its next succeeding segment limiting the movement of said segments relatively to each other, and means exterior of the conduit for moving one of said segments within the next succeeding segment for partially uncovering the firing opening, continued movement of said first named segment causing the remaining segments by reason of their engaging relation to be successively moved within one another to further uncover said firing opening.

15. In combination with a firebox having a wall provided with a firing opening therethrough, a stoker discharge conduit for delivering fuel to said opening, the discharge end of said conduit embracing said opening, the forward portion of said conduit being formed of a plurality of pivotally mounted segments arranged to slide within one another, each of said segments having means for engaging its next succeeding segment limiting the movement of said segments relatively to each other, and power means including a motor comprising a reciprocable piston connected to one of said segments, a valve for controlling the movement of said piston and means for operating said valve, said segment being movable by said piston to partially uncover the firing opening,

continued movement of said piston causing the remaining segments by reason of their engaging relation to be successively moved to further uncover said firing opening.

OTTO MOELLER. PAUL A. KETCHPEL. 

